Ball and stick SAM molecules lie on the upper surface, with the positively charged sulphur atoms marked with a plus sign.

Wavering braids of dust motes and sulphur atoms shimmered in the raw sunlight, moving sluggishly.

It consists of a central sulphur atom surrounded by four equivalent oxygen atoms.

The active site contains an iron ion which is coordinated by the sulphur atoms of four cysteine residues forming an almost regular tetrahedron.

Instead, he began to wonder why molecules with sulphur atoms and molecules without them, though differently shaped, could both wind up smelling like rotten eggs.

Thus as the radical reacts, the received electron charge opens the ring between the sulphur atoms, and these atoms bond to the metal.

This renders the sulphur atom charged and makes it available for actin polymerization.

The hydronium ion needed to do so was produced during the activation of the sulphur atom in an earlier step.

The molecules are puckered rings containing eight covalently bonded sulphur atoms (see figure 3.34).

It consists of long chains of sulphur atoms which, at room temperature, break up and reform to produce S8 molecules crystallising in the orthorhombic lattice.